Elijah hallett



2 SheetsSheet I.

E. H'ALLETT. Machine for. Rolling Oar Axles.

No. 242,532. Patented June 7,1881.

' @vwzw/ W 2 Sheets-Sheet 2. E HALLETT Machine for Rolling Oar Axles.No. 242,532.

Patented June 7,1881.

NITED STATES PATENT OFFICE.

ELlJ AH HALLETT, OF PITTSBURG, PENNSYLVANIA, ASSIGN OF ONE-HALF TORICHARD THOMPSON, OF SAME PLACE.

MACHINE FOR ROLLING CAR-AXLES.

SPECIFICATION forming part of Letters Patent No. 242,532, dated June *7,1881,

Application filed September 9, 1879.

To all whom it may concern:

Be it known that I, ELIJAH HALLETT, of Pittsburg, in the county ofAlleghen y and State of Pennsylval'iia, have invented certain new anduseful Improvements in Machines for the Manufacture of Railroad-GarAxles; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it pertains to make and use it, reference being hadto the accompanyingdrawings, which form part of this specification.

My invention relates to an improvement in machines for the manufactureof railroad-car axles; and it consists in the construction of two setsof rollers, by which the axles are rolled and turned out finished in oneheat, instead of being hammered out and requiring from four to fiveheats, as is now the custom. The advantage obtained by rolling the axlesinstead of hammering them is not only that in the same length of time agreater number can be made, but also that they are of greater uniformityand of a better finish.

The accompanying drawings represent my invention.

Figure 1 is a side elevation of my invention. Fig. 2 is an end view ofthe same, and Fig. 3 is a vertical cross-section. Fig. 4 is a side ele-0 vation of. the roughing and finishing rolls,

showing their relative positions.

To the bed-plate A are bolted the housings B, of which there are twopairs, one of them for the roughing-rollers and the other for thefinishing-rollers. The number ot'housings may be increased, if more workis required than two sets of rollers can perform. In each of thehousings is a horizontal slot for the retention and guidance of thejournal-boxes D of two 40 horizontal rollers, O, which boxes arecontrolled by the set-screws E to keep the rollers at the requireddistance from each other. The two sets of roughing and finishing rollsare connected directly together, as shown in Fig. 4,

so that when one set is made to revolve the other set revolves also.

On top, in the middle of the horizontal slot, is another, a verticalone, Gr, also for the retention and guidance of a journal-box of a thirdroller, F, which, by means of hydrostatic pressure, steam, or otherpower, may be raised or lowered and held in the required position.

The first-named rollers, O, placed on the same horizontal plane, aregeared to revolve in the same direction; but the upper one, F, runs freeand revolves by friction, but may, if it be found necessary, be run by-apulley, a, at the end of its journal.

As will be seen, the only difference between the two sets of rolls isthat one set has flanges upon them for the purpose of shaping the endsof the axle while being rolled.

In the present case the rollers are of a form to give the required shapeto axles for railroadcars; but they may be altered to produce any otherform desired.

The operation of the machine is as follows: The upper roller, F, israised to admit the heated billet, which may be placed upon the rollers0 either from the side or through the vertical slot in the housing. Theupper roller, now being lowered, begins its revolutions simultaneouslywith the others, and the billet, compressed by all three of the rollers,is made to assume the reverse form of them. To obtain good work it isnecessary that the rollers should be accurately alike and be welladjusted. Having given to the billet the form of the axle in the rough,the upper roller is again raised and therough axle passed through thevertical slot next to the housing of the finishing-rollers, and theresubjected to the action of the finishing-rollers until its form hasbecome perfect. The whole work of making the axle is thus performed inone heat.

The two sets of rollers differ only in this, that the first turn out theaxles in the rough without journals, while the finishing-rollerscomplete the work, not only by adding the journals, but also bysmoothing the axles from end to end.

Having thus described my invention, I claim- In a machine for themanufacture of caraxles, the combination of the housings B B, a set ofroughing fiangeless rolls, 0 F, and a set of finishing-rolls providedwith flanges for finishing the ends of the axles, the housings beingplaced in the relation to each other as hereunto set my hand this 19thday of August, shown, and provided with suitable openings 1879. in theiradjacent ends, whereby the axle can be transferred from one set to theother and 5 finished during a single heat, substantially as Nitnesses:

G. W. CARNS, JAMES NUsoN.

ELIJ AH HALLETT.

shown and described.

In testimony that I claim the foregoing I have

